import time
from datetime import datetime, timedelta

from flask import render_template, request, current_app, session, redirect, url_for, g, jsonify

from info import constants, db
from info.models import User, News, Category
from info.utils.image_storage import storage
from info.utils.response_code import RET
from . import *
from info.utils.common import user_login_data


@admin_bp.route('/login', methods=['GET', 'POST'])
def admin_login():
    if request.method == 'GET':
        # 去 session 中取指定的值
        user_id = session.get('user_id', None)
        is_admin = session.get('is_admin', False)
        # 如果用户 id 存在，并且是管理员，那么直接跳转到管理后台主页
        if user_id and is_admin:
            return redirect(url_for('admin.admin_index'))
        return render_template('admin/login.html')

    # 获取参数
    username = request.form.get('username')
    password = request.form.get('password')

    if not all([username, password]):
        return render_template('admin/login.html', errmsg='参数不足')

    try:
        user = User.query.filter(User.mobile == username).first()
    except Exception as e:
        current_app.logger.error(e)

    if not user:
        return render_template('admin/login.html', errmsg='用户不存在')

    if not user.check_passowrd(password):
        return render_template('admin/login.html', errmsg="密码错误")

    if not user.is_admin:
        return render_template('admin/login.html', errmsg="用户权限错误")

    session["user_id"] = user.id
    session["nick_name"] = user.nick_name
    session["mobile"] = user.mobile
    session["is_admin"] = True

    return redirect(url_for('admin.admin_index'))


@admin_bp.route('/index')
@user_login_data
def admin_index():
    user = g.user  # type: User
    return render_template('admin/index.html', user=user.to_dict())


@admin_bp.route('/user_count')
def user_count():
    # 查询总人数
    total_count = 0
    try:
        total_count = User.query.filter(User.is_admin == False).count()
    except Exception as e:
        current_app.logger.error(e)

    # 查询月新增数
    mon_count = 0
    try:
        now = time.localtime()
        mon_begin = '%d-%02d-01' % (now.tm_year, now.tm_mon)
        mon_begin_date = datetime.strptime(mon_begin, '%Y-%m-%d')
        mon_count = User.query.filter(User.is_admin == False, User.create_time >= mon_begin_date).count()
    except Exception as e:
        current_app.logger.error(e)

    # 查询日新增数
    day_count = 0
    try:
        now = time.localtime()
        day_begin = '%d-%02d-%02d' % (now.tm_year, now.tm_mon, now.tm_mday)
        day_end = '%d-%02d-%02d' % (now.tm_year, now.tm_mon, now.tm_mday + 1)
        day_begin_date = datetime.strptime(day_begin, '%Y-%m-%d')
        day_end_date = datetime.strptime(day_end, '%Y-%m-%d')
        day_count = User.query.filter(User.is_admin == False, User.create_time > day_begin_date,
                                      User.create_time < day_end_date).count()
    except Exception as e:
        current_app.logger.error(e)

    # 查询图表信息
    # 获取到当天 00:00:00 时间

    now_date = datetime.strptime(datetime.now().strftime('%Y-%m-%d'), '%Y-%m-%d')
    # 定义空数组，保存数据
    active_date = []
    active_count = []

    # 依次添加数据，再反转
    for i in range(0, 31):
        # 2018-08-31 - 1  =  2018-08-30:0:0
        # 2018-08-31 - 2  =  2018-08-29:0:0
        begin_date = now_date - timedelta(days=i)
        #  now_date - timedelta(days=(i))  + timedelta(days=(1))
        #  begin_date + timedelta(days=(1))
        # 2018-08-30:24:00
        # 2018-08-29:24:00
        end_date = begin_date + timedelta(days=1)
        # 记录这个月的每一天  30 29 ....01
        # strftime将date格式转换成字符串
        active_date.append(begin_date.strftime('%Y-%m-%d'))
        count = 0
        try:
            count = User.query.filter(User.is_admin == False, User.last_login >= begin_date,
                                      User.last_login < end_date).count()
        except Exception as e:
            current_app.logger.error(e)
        # 记录一个月的每天的用户活跃数
        active_count.append(count)

    # 日期反转
    active_date.reverse()
    # 数据反转
    active_count.reverse()

    data = {"total_count": total_count, "mon_count": mon_count, "day_count": day_count, "active_date": active_date,
            "active_count": active_count}

    return render_template('admin/user_count.html', data=data)


@admin_bp.route('/user_list')
def user_list():
    """获取用户列表"""

    # 获取参数
    page = request.args.get("p", 1)
    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1

    # 设置变量默认值
    users = []
    current_page = 1
    total_page = 1

    # 查询数据
    try:
        paginate = User.query.filter(User.is_admin == False).order_by(User.last_login.desc()).paginate(page,
                                                                                                       constants.ADMIN_USER_PAGE_MAX_COUNT,
                                                                                                       False)
        users = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)

    # 将模型列表转成字典列表
    users_list = []
    for user in users:
        users_list.append(user.to_admin_dict())

    data = {
        "total_page": total_page,
        "current_page": current_page,
        "users": users_list
    }

    return render_template('admin/user_list.html', data=data)


@admin_bp.route('/news_review')
def news_review():
    """返回待审核新闻列表"""

    page = request.args.get('p', 1)
    keywords = request.args.get('keywords', '')
    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1

    news_list = []
    current_page = 1
    total_page = 1

    try:
        filters = [News.status != -1]
        # 如果有关键字
        if keywords:
            # 添加关键字的检索选项
            filters.append(News.title.contains(keywords))

        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page,
                                                                                          constants.ADMIN_NEWS_PAGE_MAX_COUNT,
                                                                                          False)

        news_list = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)

    news_dict_list = []
    for news in news_list:
        news_dict_list.append(news.to_review_dict())

    data = {
        'total_page': total_page,
        'current_page': current_page,
        'news_list': news_dict_list
    }

    return render_template('admin/news_review.html', data=data)


@admin_bp.route('/news_review_detail', methods=['GET', 'POST'])
def news_review_detail():
    """新闻审核"""

    if request.method == 'GET':
        # 获取新闻 id
        news_id = request.args.get('news_id')
        if not news_id:
            return render_template('admin/news_review_detail.html', data={'errmsg': '未查询到此新闻'})

        # 通过 id 查询新闻
        news = None  # type: News
        try:
            news = News.query.get(news_id)
        except Exception as e:
            current_app.logger.error(e)

        if not news:
            return render_template('admin/news_review_detail.html', data={'errmsg': '未查询到此新闻'})

        # 返回数据
        data = {'news': news.to_dict()}

        return render_template('admin/news_review_detail.html', data=data)

    # 执行审核操作

    # 1. 获取参数
    news_id = request.json.get('news_id')
    action = request.json.get('action')

    # 2. 判断参数
    if not all([news_id, action]):
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')
    if action not in ('accept', 'reject'):
        return jsonify(errno=RET.PARAMERR, errmsg='参数错误')

    news = None  # type: News
    try:
        # 3. 查询新闻
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)

    if not news:
        return jsonify(errno=RET.NODATA, errmsg='未查询到数据')

    # 4. 根据不同的状态设置不同的值
    if action == 'accept':
        news.status = 0
    else:
        # 拒绝通过，需要获取原因
        reason = request.json.get('reason')
        if not reason:
            return jsonify(errno=RET.PARAMERR, errmsg='参数错误')
        news.reason = reason
        news.status = -1

    # 保存到数据库
    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg='数据保存失败')

    return jsonify(errno=RET.OK, errmsg='操作成功')


@admin_bp.route('/news_edit')
def news_edit():
    """返回新闻列表"""

    page = request.args.get('p', 1)
    keywords = request.args.get('keywords', '')

    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1

    news_list = []
    current_page = 1
    total_page = 1

    try:
        filters = []
        if keywords:
            filters.append(News.title.contains(keywords))
        paginate = News.query.filter(*filters) \
            .order_by(News.create_time.desc()) \
            .paginate(page, constants.ADMIN_NEWS_PAGE_MAX_COUNT, False)

        news_list = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)

    news_dict_list = []
    for news in news_list:
        news_dict_list.append(news.to_basic_dict())

    data = {
        'total_page': total_page,
        'current_page': current_page,
        'news_list': news_dict_list
    }

    return render_template('admin/news_edit.html', data=data)


@admin_bp.route('/news_edit_detail', methods=['GET', 'POST'])
def news_edit_detail():
    """新闻编辑详情"""

    if request.method == 'GET':
        # 获取参数
        news_id = request.args.get('news_id')

        if not news_id:
            return render_template('admin/news_review_detail.html', data={'errmsg': '未查询到此新闻'})

        # 查询新闻
        news = None  # type: News

        try:
            news = News.query.get(news_id)
        except Exception as e:
            current_app.logger.error(e)

        if not news:
            return render_template('admin/news_review_detail.html', data={'errmsg': '未查询到此新闻'})

        # 查询分类的数据
        categories = Category.query.all()
        categories_li = []
        for category in categories if categories else []:
            c_dict = category.to_dict()
            c_dict['is_selected'] = False
            if category.id == news.category_id:
                c_dict['is_selected'] = True
            categories_li.append(c_dict)
        # 移除 最新 分类
        categories_li.pop(0)

        data = {
            'news': news.to_dict(),
            'categories': categories_li
        }

        return render_template('admin/news_edit_detail.html', data=data)

    news_id = request.form.get("news_id")
    title = request.form.get("title")
    digest = request.form.get("digest")
    content = request.form.get("content")
    index_image = request.files.get("index_image")
    category_id = request.form.get("category_id")
    # 1.1 判断数据是否有值
    if not all([title, digest, content, category_id]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数有误")

    news = None  # type: News
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)

    if not news:
        return jsonify(errno=RET.NODATA, errmsg='未查询到新闻数据')

    # 1.2 尝试读取图片
    if index_image:
        try:
            index_image = index_image.read()
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.PARAMERR, errmsg='图片参数错误')

        # 2. 将标题图片上传到七牛
        try:
            key = storage(index_image)
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.THIRDERR, errmsg='上传图片失败')
        news.index_image_url = constants.QINIU_DOMIN_PREFIX + key

    # 3. 设置相关数据
    news.title = title
    news.digest = digest
    news.content = content
    news.category_id = category_id

    # 4. 保存到数据库
    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="保存数据失败")
    # 5. 返回结果
    return jsonify(errno=RET.OK, errmsg="编辑成功")


@admin_bp.route('/news_category')
def get_news_category():
    # 获取所有的分类数据
    categories = Category.query.all()
    # 定义列表保存分类数据
    categories_dicts = []

    for category in categories:
        # 获取字典
        cate_dict = category.to_dict()
        # 拼接内容
        categories_dicts.append(cate_dict)

    # 移除 最新 分类
    categories_dicts.pop(0)

    # 返回内容
    return render_template('admin/news_type.html', data={'categories': categories_dicts})


@admin_bp.route('/add_category', methods=['POST'])
def add_category():
    """添加或者修改分类"""

    category_id = request.json.get('id')
    category_name = request.json.get('name')

    if not category_name:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")

    # 判断是否有分类id
    if category_id:
        try:
            category = Category.query.get(category_id)
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.DBERR, errmsg="查询数据失败")

        if not category:
            return jsonify(errno=RET.NODATA, errmsg="未查询到分类信息")

        category.name = category_name
    else:
        # 如果没有分类id，则是添加分类
        category = Category()
        category.name = category_name
        db.session.add(category)

    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="保存数据失败")
    return jsonify(errno=RET.OK, errmsg="保存数据成功")
